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136 lines
4.1 KiB
ReStructuredText
136 lines
4.1 KiB
ReStructuredText
9.4.0
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-----
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Security
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========
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Fix memory DOS in ImageFont
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^^^^^^^^^^^^^^^^^^^^^^^^^^^
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A corrupt or specially crafted TTF font could have font metrics that lead to
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unreasonably large sizes when rendering text in font. ``ImageFont.py`` did not
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check the image size before allocating memory for it. This dates to the PIL
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fork. Pillow 8.2.0 added a check for large sizes, but did not consider the
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case where one dimension is zero.
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Null pointer dereference crash in ImageFont
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Pillow attempted to dereference a null pointer in ``ImageFont``, leading to a
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crash. An error is now raised instead. This has been present since
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Pillow 8.0.0.
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API additions
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=============
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Added start position for getmask and getmask2
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Text may render differently when starting at fractional coordinates, so
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:py:meth:`.FreeTypeFont.getmask` and :py:meth:`.FreeTypeFont.getmask2` now
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support a ``start`` argument. This tuple of horizontal and vertical offset
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will be used internally by :py:meth:`.ImageDraw.text` to more accurately place
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text at the ``xy`` coordinates.
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Added the ``exact`` encoding option for WebP
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The ``exact`` encoding option for WebP is now supported. The WebP encoder
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removes the hidden RGB values for better compression by default in libwebp 0.5
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or later. By setting this option to ``True``, the encoder will keep the hidden
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RGB values.
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Added ``signed`` option when saving JPEG2000
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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If the ``signed`` keyword argument is present and true when saving JPEG2000
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images, then tell the encoder to save the image as signed.
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Added IFD, Interop and LightSource ExifTags enums
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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:py:data:`~PIL.ExifTags.IFD` has been added, allowing enums to be used with
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:py:meth:`~PIL.Image.Exif.get_ifd`::
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from PIL import Image, ExifTags
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im = Image.open("Tests/images/flower.jpg")
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print(im.getexif().get_ifd(ExifTags.IFD.Exif))
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``IFD1`` can also be used with :py:meth:`~PIL.Image.Exif.get_ifd`, but it should
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not be used in other contexts, as the enum value is only internally meaningful.
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:py:data:`~PIL.ExifTags.Interop` has been added for tags within the Interop IFD::
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from PIL import Image, ExifTags
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im = Image.open("Tests/images/flower.jpg")
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interop_ifd = im.getexif().get_ifd(ExifTags.IFD.Interop)
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print(interop_ifd.get(ExifTags.Interop.InteropIndex)) # R98
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:py:data:`~PIL.ExifTags.LightSource` has been added for values within the LightSource
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tag::
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from PIL import Image, ExifTags
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im = Image.open("Tests/images/iptc.jpg")
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exif_ifd = im.getexif().get_ifd(ExifTags.IFD.Exif)
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print(ExifTags.LightSource(exif_ifd[0x9208])) # LightSource.Unknown
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getxmp()
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^^^^^^^^
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`XMP data <https://en.wikipedia.org/wiki/Extensible_Metadata_Platform>`_ can now be
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decoded for WEBP images through ``getxmp()``.
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Writing JPEG comments
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^^^^^^^^^^^^^^^^^^^^^
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When saving a JPEG image, a comment can now be written from
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:py:attr:`~PIL.Image.Image.info`, or by using an argument when saving::
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im.save(out, comment="Test comment")
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Other changes
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=============
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Added support for DDS L and LA images
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Support has been added to read and write L and LA DDS images in the uncompressed
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format, known as "luminance" textures.
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.. _restored-image-constants:
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Constants
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^^^^^^^^^
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In Pillow 9.1.0, the following constants were deprecated. That has been reversed and
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these constants will now remain available.
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- ``Image.NONE``
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- ``Image.NEAREST``
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- ``Image.ORDERED``
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- ``Image.RASTERIZE``
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- ``Image.FLOYDSTEINBERG``
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- ``Image.WEB``
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- ``Image.ADAPTIVE``
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- ``Image.AFFINE``
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- ``Image.EXTENT``
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- ``Image.PERSPECTIVE``
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- ``Image.QUAD``
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- ``Image.MESH``
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- ``Image.FLIP_LEFT_RIGHT``
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- ``Image.FLIP_TOP_BOTTOM``
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- ``Image.ROTATE_90``
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- ``Image.ROTATE_180``
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- ``Image.ROTATE_270``
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- ``Image.TRANSPOSE``
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- ``Image.TRANSVERSE``
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- ``Image.BOX``
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- ``Image.BILINEAR``
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- ``Image.HAMMING``
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- ``Image.BICUBIC``
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- ``Image.LANCZOS``
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- ``Image.MEDIANCUT``
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- ``Image.MAXCOVERAGE``
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- ``Image.FASTOCTREE``
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- ``Image.LIBIMAGEQUANT``
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